Steering mechanism for vehicles



Nov. 18, 1930. o. HAAsE STEERING MECHANISM FOR VEHICLES Fld N'ov. v28, 1927 Patented Nov. 18, 19H30 `UNITED STATES o'r'ro HAAsE, or DRESDEN-Ammann GERMAY s'rnnnnvs raEcnANrsMfFoR VEHICLES f Application led November 2S, 1927, Serial NOZBQZI', andin Germany November 29, 19%;8.

|The present invention relates to a steering mechanism for vehicles, and more particularly for trailers, and has for its main object the .known kindvarefurnished at suitable points provision of means for allowing large ve- 5 hicles to be steered about a small curve by the use of an improved mechanism for causing the front and rear wheels of such vehicle to follow the same track.

Only in the case of wide streets, open spaces, courtways, yards .et-c., is it possible to steer large vehicles fitted with trailers through or around archways or the like with any degree of safety, as a relatively large space is required for the wide curve to be' taken. If the space is limited, however, the operation is not only a very slow one but in many cases also liable tov result in danger both to the brickwork as well as to the load being carried, and under certain conditions it may be impossible to drive the vehiclethrough the archway at all.

Various rmeans have already been proposed in which by the use of pulleys, gear wheels, i'

and"- i lFig. Q'isanelevation in part longitudinal 7-1 sprockets, toothed racks and similar organs, it is possible to ensure that the front and rear wheels follow the same track. Vehicles litted with such arrangements of the hitherto known kind may certainly be steered with a somewhat greater degree ofl safety than without the same, but even in these cases an unnecessarily large space is still required and it is impossible to take a slnall curve. Thus, for example, the possibility of steering with the front axle at 90 is entirely out of the question, and moreover the danger also Y exists that in the case of unfavorable dis-' eliminated, and it is possible without trouble or danger to effect steering through or around archways and the like with the front andlcapable of rotation ina horizontal plane. Asecond pulley d which, however, is merely axle situatedat '900 or more, sothat only a i very'limitedspace is required.

For `this purpose rope pulleys ofthe on the underside of' thefupper. part of. the 55 vehiclegv Asrope pulley is vfirmly connected `with the lower swivel ring. at the front of the vehicle, and an additional rope pulley which., Vhowever,isnierely half vthe size of `the first one is situated in a mannerv to be 6o rotar-yV about a verticalfaxle' in front of the swivel' frame or h ogie at the rear; vTo the Vlower/swivel ringof lthel rear vehicle is vse-k cured a `vflat iron barr having a longitudinal slot, in jsuchmanner thata bolt mounted on the projecting'end of an arm secured tothe smaller pulley Vis capable vof lperforming a positivesliding motion in the said longitudinal slot. The two pulleys areconnected with eachother by lmeans of a rope or a chain.

The'invention isillustrated by way of ex- 'ample in the accompanying drawing in which Fig; l isa-view ofthe vehicle from below,

yIn the drawing a' represents the front swivel framefor. bogie, andonth'e same is mounted the pulley b centrally: to the bolt c half the' size ofthe first one', is secured by :meansof a bolt 7 on the'underside of the body e infront of the frame or bogie at the rear. Bothl pulleys b and d are connected by means lSF of a rope g. To prevent slip of the rope on the pulleys the same maybe passed around the said pulleys twice, secured at a suitable point, and also tensioned in the known manner, forexample by the use of a jockey pulley. On theswivel frame or bogie to the rear or on the lower swivel ring h is mounted in horizontal fashion ra flat iron ban i having a lon-V gitudinal slot lo, in such manner that a projecting part thereof when the vehicle is being steered oscillates over the smaller pulley d, and thatfthe slot k projects beyond an arm Z of suitable length mounted on the pulley d. The arm Z is mounted horizontally on the lower side of the pulley d and in the normal ico.

position is situated parallel to the flat iron bar z', the arrangement being such that a round bolt m, which is situated at the end of the arm Z projecting over the edge of Ythe pulley al, is capable of sliding in positive fashion in the longitudinal slot 7c.

Thefoperationis as follows If, `for example,-the vehicle or vehicle shaft moves to the extent of 45 to the left, the front swivel frame or bogientogether with the swivel ring a is also moved tothe left together with the pulley b. This rotation 'of the pulley b to the extent of 45 is transmitted through the mediumpfthe rope g to the smaller pulley d. Since the latter is merely half the size vfofqthe pulleylbfthepulley d performs a rotation which 1s,,accordingly-twice the size, i. e., '900. `The arm Z mounted on the pulley al moveswith its boltmlon the projecting end in the slot ckof `thefibar z', `and accordingly ,moves-the rear steering wheeland wheels to :the-extentxo, say, l221/2," towards the right '(Eig. 1A). Iffthe front Wheels are rotated .ring L andthe rear wheels islmoved again Yinto i ltheforiginal position, so -that upon rotation of the frontwheels by19O the rear wheels are again. situated` in -a-straight line with the upper part ofthe Vehi cle.

'Ehegbolt m naturally requires to be adjust- :ableonathe arm in accordance with the'nature of the vehicle, the axle loaseetc.v

What I claim as new and desire to secure fby Letters vPatent is A v In` ia `steering mechanism for vehicles, a lfront bogie, a pulley -rmly secured thereto, a ,rearrbo'gie, `a second pulley which-is smaller ,thanthefsaid Iii-st pulley mounted in front of the rear bogie, a rope transmitting the movementoffthe said `first pulley to the said smaller pulley, an arm mounted on the saidsmaller pulley, a flat riron bar mounted on the rear :bogieaa longitudinal slot in the said bar, and a ,'bolton the said arm engaging in the said slot,

,thearrangement lbeing lsuch that the move- -mentfofthe-said smaller pulley is transmitted `in positive .fashion :tothe rear bogie.

[In testimonygwhereof Ihave aiixed my sig- ,n ature;

OTTO HAASE. 

